I am so sick of them. Don't know if anyone else has problems with them ? I do an estate that is a little out in the sticks so to speak and the housemartin activity is so high there. It's not normally too much of a problem but this week has been terrible. Because it's been so bloody hot, people have all their windows open, the little top openers make a beautiful sanitation fixture for all the bird droppings, they always build their nest above these windows it seems and I'm so sick of having to use my scraper to remove literally inches of build up from these things. Then the wind catches the powdery substance which blows in my face, sticks to my sweat soaked arms and face...I'm spitting it off my lips etc etc. Then there's the mess it leaves on the upvc frames, it stains and it's not even worth trying to scrub them clean anymore because next week, they'll be destroyed again. An house that normally takes me 30 minutes, took over an hour today...not a very happy hour again for me today. Please tell me I'm not the only one with this curse lying over my head...literally ! Mart.